My father is 73, has been driving trucks since before he had a license helping relatives farm. Class A with doubles/triples. Also licensed crane operator. He has hauled everywhere from Mexico to the North Slope hauling 1,000,000 lb rigs on the artic ocean.
He has a dually, even when he didn't have a big heavy 5er because he likes the stability. On that note, even though he has the truck to do it, he didn't buy a 45' TH when he was looking. He feels they are too long and too heavy for a pickup. You look at these loaded semi's going down the highway, most of them have more weight on the truck axles than the trailer, giving more control. Towing a 18k trailer with a 8k truck with only 3k going on the pin is, in his opinion, crazy.